在一篇最近的文章[物理信 A 372 (2008 ) 417 ] ,王等。建议了一个方法,它被叫(G'/G ) 扩大方法,寻找非线性的进化方程的旅行波浪答案。包含 KdV 方程, mKdV 方程,变体 Boussinesq 方程,和 Hirota 一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G ) 扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文,我们将证明(G'/G ) 扩大方法等价于扩大 tanh 功能方法。
In a recent article [Physics Letters A 372 (2008) 417], Wang et al. proposed a method, which is called the (G′/G)-expansion method, to look for travelling wave solutions of nonlinear evolution equations. The travelling wave solutions involving parameters of the KdV equation, the mKdV equation, the variant Boussinesq equations, and the Hirota-Satsuma equations are obtained by using this method. They think the (G′/G)-expansion method is a new method and more travelling wave solutions of many nonlinear evolution equations can be obtained. In this paper, we will show that the (G′/G)-expansion method is equivalent to the extended tanh function method.